सादृश्यता (analogy) को पूरा करने के लिए लुप्त संख्या ज्ञात कीजिए: 6 : 42 :: 9 : ?

LF 58 is related to ID 49 in a certain way. In the same way, YK 36 is related to VI 27. To which of the following is RO 61 related, following the same logic?

Select the letter group from the options that follows the same logic as the two pairs given below: HN : JF :: MO : MS